Data from Lionel Wiener, Les chemins de fer du Breñsil (Paris: H. Dunod et E Pinat, Editeurs, 1912), p. 115. Works numbers were 3469-3470, 3517-3520 in 1892.
NB: Tube heating surface shown in Lionel Wiener's table resulted from calculations using tube inside diameters ("fire side"); it was given as 57.9 sq m (623 sq ft). the table shows the external diameter, from which Locobase derived both the tube and evaporative heating surfaces.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 78/50 |
| Locobase ID | 20851 |
| Railroad | Mogiana |
| Country | Brazil |
| Whyte | 4-4-0 |
| Number in Class | 6 |
| Road Numbers | 78-81, 64-65/50-55 |
| Gauge | Metre |
| Number Built | 6 |
| Builder | Beyer, Peacock |
| Year | 1892 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.66 / 2.64 |
| Engine Wheelbase (ft / m) | 17.42 / 5.31 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.50 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 40,785 / 18,500 |
| Engine Weight (lbs / kg) | 62,832 / 28,500 |
| Tender Loaded Weight (lbs / kg) | 51,147 / 23,200 |
| Total Engine and Tender Weight (lbs / kg) | 113,979 / 51,700 |
| Tender Water Capacity (gals / ML) | 1848 / 7 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.20 / 3.80 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 45 / 1143 |
| Boiler Pressure (psi / kPa) | 171.10 / 1180 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17.01" x 20" / 432x508 |
| Tractive Effort (lbs / kg) | 18,702 / 8483.09 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 2.18 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 157 - 1.89" / 48 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.22 / 2.81 |
| Firebox Area (sq ft / m2) | 74.70 / 6.94 |
| Grate Area (sq ft / m2) | 12.92 / 1.20 |
| Evaporative Heating Surface (sq ft / m2) | 791 / 73.50 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 791 / 73.50 |
| Evaporative Heating Surface/Cylinder Volume | 150.37 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2211 |
| Same as above plus superheater percentage | 2211 |
| Same as above but substitute firebox area for grate area | 12,781 |
| Power L1 | 2841 |
| Power MT | 307.14 |